Brush-holder



Patented Dec. 27, 1921..

UNITED sTATEs PATENT `OFFICE.

DUDLEY F. DILLIN, OF NORTH OANTON, OHIO, ASSIGNOB TO' HOOVER SUCTION SWEEPER COMPANY, OFN'EW BERLIN, OHIO, A CORPORATION 0F OHIO.

, BRUSH-HOLDER.

l of which the following is a specification.

My invention relates to brush' holders for pigtail type of carbon or'graphite brushes, and particularly to brush holders in connection with electrical apparatus which comprise means for holding the brush and pigtail and a tension spring'by which the brush is held against a eommutator or other electrical part. One object of my invention is to provide such a structure-wherein, repair, replacement,`and readjustment of the brush or spring maybe readily made. Another obgect is tomake unnecessary the disassembling of the brush unit comprising brush, pigtail connecting cable, insulating beads and terminal, when removing the brush unit from its holder. Other objects will appear from time to time throughout the specifications' and claims.

My invention is illustrated more o'r less dagrammatieally, wherein:

Figure 1 is a plan view;

Fig. 2 is a side elevation `of one side with pitail broken away;

' `ig. 8 is a vertical section along the line 3-3 of Fig. 2.

Like parts are designated by like characters throughout.

A is a hollow'metallic casing adapted to inclose the brush B and the spring C. B1 is the brush pigtail and has upon it the insulators B2- 2. B3 is a'contact part or terminal soldered or otherwise permanentl secured to the pigtail B1. D is a longitu inal slot v in the side of the casing A through ,which the pigtail B1 normally protrudes and in which it is adapted to move in response to any variation in the position of the brush.

E is a slot at right angles with slot D and communicating with it. F is a slot parallel to the slot D communicating with the slot E and extending to the end of the casing A. The use and operation of my inventionre as follows: f The brush is, of course, constantly subject to friction andis, therefore, gradually worn down orit collects oiland grease which` gums 'it thus making cleanin necessary. In previous forms of. brush olders such replacement has only been vmade possible by re- Specication of Letters Patent.

Patented Dec. 27,1921.

Application-mea February 1`1, 1920. serial No. 357,845.

moval ofthe contact part or terminal which is usually soldered on, or by other disarrangement of the parts of the brush holder.

In my brush holder, however, by reason ofthe slots which are out in such a way, it is possible to make any such changes or replacement by merely passing the brush pigtail through the two slots and the brush and pigtail may then be removed intact. This, of course, also enables me to remove the spring. By the arrangement, therefore, I am able to make any replacement or readjustment which may from time to time be necessary without in any way breaking or changing any of the structural arrangements which are normally designed to be permastructure of which it formsfa part, and this holding part forms no part of my invention and, therefore, is not illustrated herewith.

I have spoken of the two slots which 4I have shown in the illustrations as longitudinal and as being connected by a third slot. It is, of course, obvious that this third slot is in reality a part of the slot which is intended to' allow the pigtail to be removed from the shell, and. while this third slot is at right angles to the other two slots this arrangement might'be widely varied .without departing from the spirit of my invention.

The shell as shown is rectangular in see-A tion but this might be varied, and it might, for example, be circular in section, and if such were the case, the slot arranged for the brush'remov'al might be curved or spiral or otherwise varied in shape.

Although I have shown in my drawin s an operative arrangement, still it will be o vions that many changes other than those above outlined might be made in the shape',

arrangement and size of .parts without de` said shell spaced apart from each other and extending, .one toward one en d of said shell and the other toward the other, and a third slot connecting them.

2. A brush holder comprisin a hollow shell open at one end and parta 1y open at the other, two slots through the wail of said shell spaced apart from each other and extending, one toward one end of said shell and the other toward the other, and a third slot connecting them.

3. brush holder comprising a'rhollow sheli two slots through the wall of said shell spaced apart from each other and 'extending, .one toward one end of said shell and the other toward the other and a third slot connecting them in combination with a brush adapted to enter the open end and a pigtail attached to said brushand adapted to' project through any of said slots.

il. A brush holder comprising a hollow sheli open at one end and partially open at the other, two slots through the wall of said shell spaced apart from each other and eX tending, an'd the other toward the other, and a third slot connecting them in combination with a brush adapted to enter the open end and a pigtail attached to said brush and adapted to project through any of said slots. l

A brush holder comprising a hollow shell two slots through the wall of said shell spaced apart from each other and extending, one toward one end of said shell, and the other toward the other, and a third slot connecting them in combination with a brush adapted to enter the open end and a pigtail attached to-said brush and adapted to project through any of said slots and to be moved through all of saidslots.

6. A brush holder comprising a hollow shell open at one end and partially open at the other, two slots through the wall of said shell spacedapart from each other and extending, one toward one end of said shell and the other toward the other, and a third j s1ot connecting them in combination with a brush adapted to enter the open end and a pigtail attached to said brush arid adapted to`project through any `oi said slots and to be moved through all of said slots.

7. A brush holder comprising a hollow shell open at one end and partially open vat the other, two slots through the wall of said shell spaced apart from each other andl extending, one toward one end of said shell and the other toward the other, and a third slot connecting them in combination with a spring adapted to enter said open end and to bear against said partially closed end and a brush adapted to enter said open end and rest against said spring and a pigtail attached to said brush and adapted to project through-.one of said slots. i

8. A brush holder comprising a hollow Ishell two slots through the wall of said shell spaced apart from each other and extending," one toward one end of said shell and thev other toward the other, and a third slot- .connecting them in combination with va spring adapted to enter said open end and one toward one end of said shellmonete to hear against said partially closed end and a Tbrush adapted to enter said open end and to rest against said spring and a pigtai; attache?L to said brush and adapted to project th-i )ugh one of said slots and adapted to be n` oved through all orD said slots.

9. .fr brush holder comprising a hollow-V sheli open at one end and partially open the other, two slots through the wall of saici shell spaced apart from each other and en tending, `one toward one end, or said sheii through one of said slots and adapted to he moved through all of said slots.

10. As a new article of manufacture a unitary brush structure comprising in combination a hollow shell having. two slots through its wall spaced apart from each other and extending one from one end of said shell and the `other towardI the other, and a third slot connecting them, in combination with a 'brush' assembly positioned within said shell, and a. pig tail attached to said brush adapted to project through one of said slots.

11. As a new article of manufacture a unitary brush structure comprising in combination a hollow shell having two slots 4through its wall spaced apart from each .of said slots and adapted to be moved through all of. said slots. 12. As a new article of manufacture a unitary brush structure comprising in combination a hollow shell having two slots through its wall spacedv apart from each other and extending one toward one endet the shell and the other toward the other. and a third slot connecting them, a brush within said shelland a spring bearing upon said brush tending to force it out of the shell. means for limiting the-action of said spring comprising a pig tail attached to said brush alnd adapted to project through any of said s ots. v

In testimony whereof,-I aix my signature in the presence of two witnesses this sixth day of January, 1920.

DUDLEY F. DILLINr Witnesses:

H. EARL HOOVER, H. E. GOUGLER. 

